*{
  box-sizing: border-box;
}

body {
  background-color: #131720;
}

h3{
  color:aqua;
}

.topnavig{
  overflow:hidden;
  background-color: #131720;
  padding: 10px;
}

.topnavig a{
  float:left;
  display:block;
  color:aqua;
  text-align:center;
  padding:14px 16px;
  text-decoration: none;
  font-size: 1.2rem;
  text-transform: uppercase;
}

.topnavig .search-c{
  float:right;
}

form{
  background-color:#151f30;
  width:300px;
  height:43px;
  border-radius: 50px;
  display:flex;
  align-items:center;
}

input {
  all:unset;
  font:15px system-ui;
  color:#fff;
  height:100%;
  width:100%;
  padding:6px 9px;
}
.thumbnail{
  height:350px;
  width:250px;
  border-radius: 19px;
}

.column{
  float:left;
  width: 25%;
  padding:10px 10px;
}

.card {
  width:300px;
  border-radius: 19px;
  padding: 15px;
  text-align:center;
  background-color: #151f30;
}